[4] [4] FAN D W, DE COOMAN B C. State-of-the-knowledge on coating systems for hot stamped parts［J］. Steel Research International, 2012, 83(5): 412-433.

[5] [5] WANG X N, CHEN X M, SUN Q, et al.Formation mechanism of -ferrite and metallurgy reaction in molten pool during press-hardened steel laser welding［J］. Materials Letters, 2017, 206: 143-145.

[6] [6] CHEN X, LEI Z L, CHEN Y B, et al. Microstructure and mechanical properties of laser welded Al-Si coated hot-press-forming steel joints［J］. Materials, 2019, 12(20): 3294.

[7] [7] LEE C W, KIM S Y, JANG S G, et al. Fusion zone microstructural evolution of Al-10% Si coated hot stamping steel during laser welding［J］. ISIJ International, 2019, 59(1): 136-143.

[8] [8] SAHA D C., BIRO E., GERLICH A P, et al. Fiber laser welding of Al-Si-coated press-hardened steel［J］.Welding Journal, 2016, 95(5): 147-156.

[9] [9] WANG X N, YI G, SUN Q, et al. Study on -ferrite evolution and properties of laser fusion zone during post-weld heat treatment on Al-Si coated press-hardened steel［J］. Journal of Materials Research and Technology, 2020, 9(3): 5712-5722.

[10] [10] VIERSTRAETE R, EHLING W. Laser ablation for hardening laser welded steel blanks［J］.Industrial Laser Solutions for Manufacturing, 2010, 25(2): 6-11.

[12] [12] LIN W H, LI F, HUA X M, et al. Effect of filler wire on laser welded blanks of Al-Si-coated 22MnB5 steel［J］. Journal of Materials Processing Technology, 2018, 259: 195-205.

[13] [13] DILTHEY U, FUEST D, SCHELLER W. Laser welding with filler wire［J］. Optical and Quantum Electronics, 1995, 27(12): 1181-1191.